I just hit 400 miles today. I had the air conditioner turned on and noticed a "buzzing" sound coming from the firewall on the drivers side that sounds something like ABS does when it kicks in. It makes this sounds for about two seconds when I press the brake when moving and when I accelerate from a stop. If I turn the air conditioner off, it doesn't do this. Is anybody else hearing this sound? White 2004 BC #9
Perfectly normal, part of the regen system. my #9 has made the same sound since i took delivery and 8900 miles later it still does without ill effect. I doubt it has nothing to do with the a/c.
